GI Pipe Weight Chart

GI Pipe Weight Chart

Find your nominal bore (NB) in the first column, then read across for light, medium or heavy class. All weights are in kg/m and include zinc on the inside and outside.

GI Pipe Size Chart in mm and Inch

Some drawings list pipe in inches and some in millimeters. This table matches the two, so you pick the right row in the weight chart.

Note that NB is a name, not a measurement. A 50 NB pipe measures 60.3 mm on the outside.

Weight Chart Galvanised ERW pipe

Galvanised ERW pipe also comes in schedule sizes under ASME B36.10 and ASTM A53. If your drawing says SCH 40, use this table. It shows the black pipe weight and the GI weight side by side.

Heavy duty gi pipe weight chart

Heavy class pipe has the thickest wall in IS 1239. It handles higher pressure and rough use, and it weighs more. The last column shows the weight of a full 6 m length, which helps with lifting and loading.

Price list of galvanised steel pipe

The price of a GI pipe depends on its weight and the steel rate on the day you buy. So the best price list is a weight-based one. Multiply the weight by your supplier's rate per kg.

The table below uses an example rate of ₹80 per kg for medium class pipe. Replace it with the live rate and the numbers update in one step.

GST, freight and cutting charges come on top. Large orders usually get a lower rate per kg, so always ask for a bulk quote.

Tata Structura Square Hollow Sections Weight Chart

Square hollow sections follow IS 4923 and EN 10219. The table gives the weight in kg/m for each size and wall thickness. The values are for black sections with rounded corners. Zinc adds about 2 to 3 percent, so add that for the galvanized weight. A brand's own sheet can differ by a small margin.

Weight of Tata Structura Rectangular hollow sections

Rectangular sections carry more load along their long side, so fabricators use them for purlins, frames and supports. Weights are in kg/m for black sections. Add 2 to 3 percent for the zinc coating.

Chemical compositon of GI round pipe

A GI pipe is mild steel with a zinc skin. The steel inside sets the strength, and the zinc outside stops rust. The table shows the chemical limits for ASTM A53, in percent.

IS 1239 pipes use a similar low carbon mild steel. The zinc coating averages about 400 g/m², which is roughly 55 microns thick.

Galvanized rectangular pipe mechanical properties

Strength depends on the grade. Higher yield and tensile numbers mean the pipe can take more load before it bends or breaks.

Types of GI Pipes

You can pick a GI pipe by its wall class, by how the zinc goes on, or by its shape. Each type has its own weight per meter, so check the weight chart before you order.

• Light Class GI Pipe: This pipe has the thinnest wall in IS 1239, so it is the lightest and cheapest. A 25 NB pipe weighs about 2.07 kg/m. It suits low pressure water, air and light conduit work.
• Medium Class GI Pipe: This is the everyday choice for plumbing, fire lines and general piping. A 25 NB pipe weighs about 2.48 kg/m. It gives a good balance of strength, weight and cost.
• Heavy Class GI Pipe: The wall is thicker, so the pipe weighs more and handles higher pressure. A 25 NB pipe weighs about 3.00 kg/m. Use it for buried lines, rough sites and long service life.
• Hot Dip GI Pipe: The mill dips the whole pipe in molten zinc, so the coat covers the inside and the outside. The layer is thick and lasts for years in wet or outdoor places. It adds about 2 to 5 percent to the black pipe weight.
• Pre-Galvanized GI Pipe: The mill makes this pipe from steel strip that already has a zinc coat. The coat is thinner and the pipe is lighter. It works well for fencing, furniture, greenhouse frames and light structures.
• Schedule 40 GI Pipe (ASTM A53): This pipe follows ASME B36.10 sizes, so you order it in inches. A 2 inch pipe weighs about 5.58 kg/m. Use it when your drawing lists SCH 40.
• GI Square and Rectangular Hollow Sections: These tubes follow IS 4923 and EN 10219. A 50 × 50 × 3 mm section weighs about 4.25 kg/m before zinc. Builders use them for frames, purlins, gates and supports.

Application of Galvanized Hollow Pipe

Galvanized hollow pipes and sections last a long time wherever steel meets rain, damp air or soil. The zinc coat keeps rust away, and the hollow shape gives strong support for less weight. Use the weight chart to pick the size that fits each job.

• Plumbing and water supply: Medium class pipes carry drinking water and tank water in homes, offices and factories. A 25 NB pipe weighs only 2.48 kg/m, so one person can fit it easily.
• Fire fighting: Installers lay GI pipes for sprinkler and hydrant lines. Check the weight per meter, then plan hangers that hold the pipe with water inside.
• Construction: Builders weld square and rectangular hollow sections into trusses, purlins, handrails and shed frames. A 50 × 50 × 3 mm section weighs about 4.25 kg/m, which keeps the frame strong and light.
• Agriculture: Farmers use GI pipes for irrigation lines, greenhouse frames and fences. The zinc coat stands up to sun, rain and wet soil.
• Solar mounting: Crews build panel stands from hollow sections on roofs and open land. Light weight eases the load on the roof, and the coat survives years outdoors.
• Electrical conduit: Electricians run cables through GI pipes in buildings and plants. The steel wall protects the wires from knocks and damage.
• Furniture and fabrication: Workshops turn thin wall sections into racks, gates, grills and tables. The finish takes paint well and resists rust.

Gi Pipe Weight Calculation Formula in Kg

You can find the weight of any GI pipe with one simple formula.

OD is the outside diameter in mm, and WT is the wall thickness in mm. The number 0.02466 comes from the density of mild steel, which is 7,850 kg/m³. After that, add 2 to 5 percent for zinc. Small pipes sit near 5 percent, and big pipes sit near 2 percent.

Example: Take a pipe with 60.3 mm OD and 3.6 mm wall. The math is (60.3 − 3.6) × 3.6 × 0.02466, which gives 5.03 kg/m. Add zinc and you get about 5.18 kg/m. One 6 m pipe then weighs about 31.1 kg.

To change kg/m into lb/ft, multiply by 0.672.

50 mm Gi Pipe Weight

A 50 mm GI pipe weighs 4.25 to 6.33 kg per meter, based on its class. Its outside diameter is 60.3 mm. Medium class is the usual pick for water lines.

Factors Affecting Mild Steel Pipe Weight

Several things change what a pipe weighs. Outside diameter and wall thickness matter most. A bigger pipe or a thicker wall holds more steel, so the weight goes up. The class you choose, light, medium or heavy, sets the wall, so heavy pipe always outweighs light pipe of the same size.

Zinc coating adds a small amount, and a thicker coat adds more. Threaded and socketed ends add a little too. Finally, mills roll pipe within a tolerance, so one pipe can run slightly heavier or lighter than the chart. That is why the standard allows a small weight range.

GI Pipe Weight vs Black Pipe Weight

Galvanizing makes a pipe a little heavier, because the zinc layer has weight. The gap is small. It runs near 4 percent on thin small pipes and near 2 percent on thick large ones.

These figures are for medium class pipe.

Tolerances of Tata Gi Pipes

Every pipe can differ a little from its chart weight. The standard sets how much. The table shows IS 1239 Part 1 limits. Check them when your pipes arrive.

GI Pipe Colour Code as per IS 1239

IS 1239 marks each class with a colored band, so you spot the class from across a yard.

How GI Pipes Are Galvanized

Makers galvanize a pipe in a few steps. First, workers wash off oil and dip the pipe in acid to clear rust. Next, they dip it in a flux bath, which helps the zinc stick. Then they lower it into molten zinc at about 450°C. The zinc bonds to the steel and forms a tough, even layer inside and out. After that the pipe cools, and inspectors check the coating for weight, thickness and gaps. This coat is the reason GI pipe lasts years longer than black pipe in wet places.

How to Pick the Right GI Pipe Class

Match the class to the job. Light class suits low pressure air and water lines where weight and cost matter. Medium class fits most plumbing, fire lines and general work, so it is the safe default. Heavy class suits high pressure lines, buried lines and sites where pipes take knocks. When in doubt, check the pressure rating and the standard in your project specs, then use the weight chart to plan the load.

GI Pipe Pieces per Tonne

Knowing how many pipes make one tonne helps you plan trucks and stock. The table covers 6 m medium class pipes.